Hi! As far as the DDP if you need to be flexible and make your plans as you go, I would say that is another strike against it. Do you really want to spend a lot of time trying or waiting to get a TS table without an ADR so you can use your credit? We like to be in the parks too, and riding rides, which means flexibility and just eating when you are hungry and what you feel like! We only like TS for a nice early dinner/rest, but we don't like to plan ahead where we will be, at all. The gift card is a nice idea for payment.
On our POR stay we had no issue with the buses, and we go in the summer. I'm tempted to say that overall the bus service for everywhere is the same, with some ups and some downs all over the place because so many people are using the service. But it is a good point about 7 bus stops at CBR...never been there, but that would bug me personally. We did not overly love the food court at POR, but I only post this because you will get opinions every which way about every place, and I think overall they are all generally the same level of quality and just depends on peoples' tastes! So don't let a couple of bad reviews scare you, but if they are ALL bad, that's a different story!
I think that CSR has been refurbed in recent years so the poster who posted that it looked dated after their POR stay, that may have changed now. If easy busing is your thing, after reviewing all mods on this board for my decision I would say that CSR is your winner. But I bet it won't be terribly different if you try another one because you want to try something new!